[vsnet-alert 5186] Rho Cassiopeiae

["Bjorn H. Granslo" <b.h.granslo@astro.uio.no>]

Norwegian Astronomical Society - Variable Star Section

              ***** RHO CASSIOPEIAE *****

The following visual observations by undersigned indicate that
Rho Cassiopeiae is markedly fainter than normal:

2000 UT     Observation   Mag.
May  8.04   B-6;E-2 [2]   4.9
Jun  2.98   B-7;E=V [2]   4.9
Aug  5.94   E-4;H+3 [1]   5.3
Aug  7.94   E-4;F+3 [2]   5.3
Aug 13.04   E-6;H+1 [1]   5.5
Aug 13.99   E-6;H+1 [2]   5.5

Observations are Pogson step estimates (one step = 0.1 mag.).
Comparison stars (Identifications from BAA.VSS, V magnitudes from
Yale Bright Star Catalogue, 5th edition): B = 4.16 (Kappa Cas);
E = 4.88 (Sigma Cas); H = 5.56 (HR 9059, 16' W of Sigma Cas).

Can anyone confirm this activity?

Rho Cassiopeiae is a supergiant variable that normally is shining
at magnitude 4.5-5.0. It underwent a major fading episode to mag. 6
during 1945-1947. 

Observer: B. H. Granslo (Fjellhamar, Norway). Instrument: 7x50 B.

                                Yours sincerely,
                                Bjorn H. Granslo
                                   (NAS.VSS)

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